update admin layout

src/lib/components/PaginationTable/PaginationTableBody.svelte

@@ -24,6 +24,8 @@
 		await onUpdate();
 		await tick();
 
+		if (!bodyElem) return;
+
 		const intersectionObserver = new IntersectionObserver(
 			async (entries, observer) => {
 				if (entries.filter((e) => e.isIntersecting).length === 0 || !entries) return;